RANS Simulations of Marine Propeller Open-Water Performance Using the GEKO Turbulence Model
Makaleler > Tam Makale · 2026
Yazarlar: Dilara KOÇAK, Utku ŞENTÜRK, Aydoğan ÖZDAMAR
INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS, SCI Expanded İndekslerine Giren Dergi, Uluslararası, 2026, cilt 1, ss 1-17
DOI: 10.1080/10618562.2026.2638276
Özet
<p><span style="color: rgb(51, 51, 51);">This study presents benchmark simulations of marine propeller flow using the Generalized k-omega (GEKO) turbulence model, designed to consolidate various two-equation models in industrial flow scenarios. Tunable parameters in GEKO facilitate the agreement of simulations with experimental data while maintaining model calibration. Through computational simulations on the INSEAN E779A propeller, we analyse the effects of GEKO parameters Csep, Cmix and Ccurv on flow characteristics. Results show that Csep mildly influences boundary layers due to rotational effects, promoting attached flow. Wake investigations indicate that the wake axial velocity deficit decreases and the turbulence intensity increases with increasing Cmix. Ccurv suppresses turbulence inside the vortex cores, extending vortex lifespans downstream. Overall, GEKO parameters exhibit mild effects on marine propeller flows with moderate turbulence. Default GEKO parameters yielded different flow fields from the SST model. Specific tuning tailored to the problem allows fine calibration of the model which is desirable in RANS scenarios.</span></p>